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package com.hfg.sql.jdbc;

import com.hfg.security.LoginCredentials;

import javax.sql.DataSource;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.SQLFeatureNotSupportedException;
import java.util.logging.Logger;


//------------------------------------------------------------------------------
/**
 Represents a JDBC-compatible DataSource.
 
 @author J. Alex Taylor, hairyfatguy.com
 
 */
//------------------------------------------------------------------------------
// com.hfg XML/HTML Coding Library
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
// J. Alex Taylor, President, Founder, CEO, COO, CFO, OOPS hairyfatguy.com
// [email protected]
//------------------------------------------------------------------------------

public class JDBCDataSource implements DataSource
{
   private String                 mName;
   private PrintWriter            mLogWriter;
   private Logger                 mLogger;
   private T                      mSettings;
   private JDBCServer             mServer;
   private LoginCredentials       mCredentials;
   private String                 mDatabaseName;

   //###########################################################################
   // CONSTRUCTORS
   //###########################################################################

   //---------------------------------------------------------------------------
   public JDBCDataSource(JDBCServer inServer, String inDatabaseName)
   {
      mServer = inServer;
      mDatabaseName = inDatabaseName;
   }

   //###########################################################################
   // PUBLIC METHODS
   //###########################################################################

   //---------------------------------------------------------------------------
   public JDBCDataSource setName(String inValue)
   {
      mName = inValue;
      return this;
   }

   //---------------------------------------------------------------------------
   public String name()
   {
      return mName;
   }

   //---------------------------------------------------------------------------
   public JDBCDataSource setSettings(T inValue)
   {
      mSettings = inValue;
      return this;
   }

   //---------------------------------------------------------------------------
   public T getSettings()
   {
      if (null == mSettings)
      {
         mSettings = initSettings();
      }

      return mSettings;
   }

   //---------------------------------------------------------------------------
   public JDBCServer getServer()
   {
      return mServer;
   }

   //---------------------------------------------------------------------------
   public String getDatabaseName()
   {
      return mDatabaseName;
   }

   //---------------------------------------------------------------------------
   public JDBCDataSource setCredentials(LoginCredentials inValue)
   {
      mCredentials = inValue;
      return this;
   }

   //---------------------------------------------------------------------------
   protected LoginCredentials getCredentials()
   {
      return mCredentials;
   }

   //---------------------------------------------------------------------------
   public JDBCDataSource setParentLogger(Logger inValue)
   {
      mLogger = inValue;
      return this;
   }

   //---------------------------------------------------------------------------
   @Override
   public Connection getConnection()
         throws SQLException
   {
      if (null == mCredentials)
      {
         throw new SQLException("No login credentials have been specified!");
      }

      return getServer().getConnection(getDatabaseName(), mCredentials, getSettings());
   }

   //---------------------------------------------------------------------------
   @Override
   public Connection getConnection(String inUsername, String inPassword)
         throws SQLException
   {
      setCredentials(new LoginCredentials(inUsername, inPassword.toCharArray()));

      return getConnection();
   }

   //---------------------------------------------------------------------------
   @Override
   public PrintWriter getLogWriter()
         throws SQLException
   {
      return mLogWriter;
   }

   //---------------------------------------------------------------------------
   @Override
   public void setLogWriter(PrintWriter inValue)
         throws SQLException
   {
      mLogWriter = inValue;
   }

   //---------------------------------------------------------------------------
   @Override
   public void setLoginTimeout(int inValueInSeconds)
         throws SQLException
   {
      getSettings().setConnectTimeoutInSeconds(inValueInSeconds);
   }

   //---------------------------------------------------------------------------
   @Override
   public int getLoginTimeout()
         throws SQLException
   {
      return getSettings().getConnectTimeoutInSeconds();
   }

   //---------------------------------------------------------------------------
   @Override
   public Logger getParentLogger()
         throws SQLFeatureNotSupportedException
   {
      return mLogger;
   }

   //---------------------------------------------------------------------------
   @Override
   public  T unwrap(Class inInterface)
         throws SQLException
   {
      try
      {
         return inInterface.cast(this);
      }
      catch (ClassCastException e)
      {
         throw new SQLException("Unable to unwrap the DataSouce to " + inInterface.getName() + "!", e);
      }
   }

   //---------------------------------------------------------------------------
   @Override
   public boolean isWrapperFor(Class inInterface)
         throws SQLException
   {
      return inInterface.isInstance(this);
   }

   //###########################################################################
   // PROTECTED METHODS
   //###########################################################################

   //---------------------------------------------------------------------------
   protected T initSettings()
   {
      return (T) new JDBCConnectionSettings();
   }

}